Quote Originally Posted by RPM Graphics View Post
so everyone is running single mufflers? right now i have dual Flowmasters, 40 series i think, they were on the truck when i first bought it.
it's only 2.5" exhaust but for now i'm just going to tie my 3" headers back into it. eventually i plan on running 3" all the way & i'm not sure if i should stick with the 2 mufflers or go to 1 muffler.
I'd ditch the 40 series. You can still run 2 mufflers if ya want but run a straight through muffler ie...magnaflow, borla, corsa. Depending on how loud you want it will determine the case size.

Quote Originally Posted by DjGreggieP View Post
I'm just running a single muffler for now, eventually I want to swap out to dual BORLA XR-1's when I pick up my long tube headers, just not in the cards financially right now lol.

Question still to be answered, do I pull the cats now?
Leave the cats on man, it'll sound better with stock manifolds. Once you get the LT's then ditch the cats. I can't imagine how ungodly loud that muffler will be without the cats.